data_global
_chemical_name_mineral 'Paralammerite'
loop_
_publ_author_name
'Starova G L'
'Vergasova L P'
'Filatov S K'
'Britvin S N'
'Ananyev V V'
_journal_name_full 'Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva'
_journal_volume 140 
_journal_year 2011
_journal_page_first 46
_journal_page_last 51
_publ_section_title
;
 Lammerite-beta, Cu3(AsO4)2 - a new mineral from fumaroles of the Great
 Fissure Tolbachic eruption (Kamchatka, Russia)
;
_database_code_amcsd 0018801
_chemical_compound_source 'Second cinder cone, North Branch, Tolbach volcano, Kamchatka, Russia'
_chemical_formula_sum 'Cu3 As2 O8'
_cell_length_a 6.306
_cell_length_b 8.643
_cell_length_c 11.310
_cell_angle_alpha 90
_cell_angle_beta 92.26
_cell_angle_gamma 90
_cell_volume 615.947
_exptl_crystal_density_diffrn      5.052
_symmetry_space_group_name_H-M 'P 1 21/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Cu1   0.24290   0.16450   0.63220   0.01000
Cu2  -0.09250   0.19000   0.43160   0.00800
Cu3  -0.61720   0.03120   0.12250   0.01100
As1  -0.58610   0.11370   0.36810   0.00500
As2  -0.10400   0.06030   0.15090   0.00600
O1  -0.04110   0.24040   0.10440   0.00900
O2  -0.51770  -0.07170   0.36410   0.01200
O3  -0.39700   0.23940   0.41770   0.00900
O4  -0.65970   0.15560   0.22620   0.01000
O5   0.08400  -0.06890   0.11880   0.01000
O6  -0.12870   0.05100   0.29830   0.01000
O7  -0.32890  -0.00220   0.08350   0.01100
O8   0.20310   0.13040   0.45540   0.01300